class.ilBiblLibraryPresentationGUI.php

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<?php

class ilBiblLibraryPresentationGUI
{

    protected $library;
    protected $facade;


    public function __construct(\ilBiblLibraryInterface $library, \ilBiblFactoryFacade $facade)
    {
        $this->library = $library;
        $this->facade = $facade;
    }


    public function generateLibraryLink(ilBiblEntry $entry, $type)
    {
        $attributes = $this->facade->entryFactory()->loadParsedAttributesByEntryId($entry->getId());
        $type = $this->facade->typeFactory()->getInstanceForString($type);
        switch ($type->getId()) {
            case ilBiblTypeFactoryInterface::DATA_TYPE_BIBTEX:
                $prefix = "bib_default_";
                if (!empty($attributes[$prefix . "isbn"])) {
                    $attr = array("isbn");
                } elseif (!empty($attributes[$prefix . "pmid"])) {
                    $attr = array("pmid");
                } elseif (!empty($attributes[$prefix . "doi"])) {
                    $attr = array("doi");
                } elseif (!empty($attributes[$prefix . "issn"])) {
                    $attr = array("issn");
                } else {
                    $attr = array("title", "author", "year", "number", "volume");
                }
                break;
            case ilBiblTypeFactoryInterface::DATA_TYPE_RIS:
                $prefix = "ris_" . strtolower($entry->getType()) . "_";
                if (!empty($attributes[$prefix . "sn"])) {
                    $attr = array("sn");
                } elseif (!empty($attributes[$prefix . "do"])) {
                    $attr = array("do");
                } else {
                    $attr = array("ti", "t1", "au", "py", "is", "vl");
                }
                break;
        }

        $url_params = "?";
        if (sizeof($attr) == 1) {
            if (($attr[0] == "doi") || ($attr[0] == "pmid")) {
                $url_params .= "id=" . $this->formatAttribute($attr[0], $type, $attributes, $prefix)
                    . "%3A" . $attributes[$prefix . $attr[0]];
            } elseif ($attr[0] == "do") {
                $url_params .= "id=" . $this->formatAttribute($attr[0], $type, $attributes, $prefix)
                    . "i%3A" . $attributes[$prefix . $attr[0]];
            } else {
                $url_params .= $this->formatAttribute($attr[0], $type, $attributes, $prefix) . "="
                    . urlencode($attributes[$prefix . $attr[0]]);
            }
        } else {
            foreach ($attr as $a) {
                if (array_key_exists($prefix . $a, $attributes)) {
                    if (strlen($url_params) > 1) {
                        $url_params .= "&";
                    }
                    $url_params .= $this->formatAttribute($a, $type, $attributes, $prefix) . "="
                        . urlencode($attributes[$prefix . $a]);
                }
            }
        }

        // return full link
        $full_link = $this->library->getUrl() . $url_params;

        return $full_link;
    }


    public function getButton(ilBiblFactoryFacadeInterface $bibl_factory_facade, ilBiblEntry $entry)
    {
        if ($this->library->getImg()) {
            $button = ilImageLinkButton::getInstance();
            $button->setUrl($this->generateLibraryLink($entry, $bibl_factory_facade->type()->getStringRepresentation()));
            $button->setImage($this->library->getImg(), false);
            $button->setTarget('_blank');

            return $button->render();
        } else {
            $button = ilLinkButton::getInstance();
            $button->setUrl($this->generateLibraryLink($entry, $bibl_factory_facade->type()->getStringRepresentation()));
            $button->setTarget('_blank');
            $button->setCaption('bibl_link_online');

            return $button->render();
        }
    }


    public function formatAttribute($a, $type, $attributes, $prefix)
    {
        if ($type->getStringRepresentation() === 'ris') {
            switch ($a) {
                case 'ti':
                    $a = "title";
                    break;
                case 't1':
                    $a = "title";
                    break;
                case 'au':
                    $a = "author";
                    break;
                case 'sn':
                    if (strlen($attributes[$prefix . "sn"]) <= 9) {
                        $a = "issn";
                    } else {
                        $a = "isbn";
                    }
                    break;
                case 'py':
                    $a = "date";
                    break;
                case 'is':
                    $a = "issue";
                    break;
                case 'vl':
                    $a = "volume";
                    break;
            }
        } elseif ($type->getStringRepresentation() === 'bib') {
            switch ($a) {
                case 'number':
                    $a = "issue";
                    break;
                case 'year':
                    $a = "date";
                    break;
            }
        }

        return $a;
    }
}